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deep-learning-wiki

personal wiki for deep learning

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Likelihood

一句话

已知事实,列出表达各个参数下,事实发生的概率,借以求参数的数值。

与Probability的区别

Probability:用已知的(影响实验结果的)参数作出(能够预测实验结果的)函数,藉以预测实验的结果。 概率是给定某一参数值,求某一结果的可能性的函数。

Likelihood:用已知的(实验)数据作出(影响实验结果的)参数的函数,藉以求取参数的数值。
似然是给定某一结果,求某一参数值的可能性的函数。

例如,抛一枚匀质硬币,抛10次,6次正面向上的可能性多大?

解读:“匀质硬币”,表明参数值是0.5,“抛10次,六次正面向上”这是一个结果,
概率(probability)是求这一结果的可能性。

例如,抛一枚硬币,抛10次,结果是6次正面向上,其是匀质的可能性多大?
解读:“抛10次,结果是6次正面向上”,这是一个给定的结果,问“匀质”的可能性,即求参数值=0.5的可能性。

Reference

https://www.zhihu.com/question/50828855

Group Convolution

一句话

分组卷积,将输入的feature map分成组,将每个卷积核也相应的分成组,在对应的组内做卷积。设组数为g,输入的channel数为c,则g=1就是普通卷积,g=c时就是深度可分离卷积。

Reference

https://www.jianshu.com/p/a936b7bc54e3

ResNet

一句话

Reference

ResNet及其变种的结构梳理、有效性分析与代码解读

self-attention

一句话

Reference

Q1: self-attention为什么叫self-attention?

Perplexity

一句话

困惑度,语言模型的评估指标,越低越好。

Reference

IPoIB

一句话

Reference

off-policy

一句话

强化学习中的一种类型

Reference

MPS

XLA

一句话

XLA (Accelerated Linear Algebra) is a domain-specific compiler for linear algebra that optimizes TensorFlow computations.

Reference

Gremlin

一句话

一种图引擎查询语言。

Reference

Triplet Loss

一句话

通过学习,使得类间的距离大于类内的距离。

Reference

cuda occupancy

一句话

Occupancy = Active Warps / Maximum Active Warps
cuda的利用率(utility)和占用率(occupancy)

Reference

RELU6

一句话

其他

帮助量化

将 swish 激活函数替换为「约束范围的」激活函数(relu6),因为后者将输出范围限制在 [0, 6]。做出此改变后,量化模型在 ImageNet 数据集上的 Top-1 准确度由之前的 46% 回升至 74.4%。

https://www.jiqizhixin.com/articles/2020-03-17-15

Reference

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